控制器中
$Topic = D('Topic');
$tid = $Topic->publish(I('post.content'), session('user_auth')['id']);
如上时报错，提示未意料的；或’
解决
$Topic = D('Topic');
$tid = $Topic->publish(I('post.content'), session('user_auth'));
然后在model中再
$uid=$session['id'];
为什么呢？